PARIS, April 13 (Reuters) - Very low groundwater levels have put France on course for a worse summer drought than last year, mainly in the southern part of the country which had been ravaged by massive wildfires, French geological service BRGM said on Thursday.

France suffered its worse drought on record last summer and, like most of Europe, has faced a dry winter that has prompted concerns over water security across the continent.

Some groundwater levels were at their lowest on record in the wine-making Roussillon region and in the southern Var region, which hosts the tourist town of Saint-Tropez. Both suffered repeated large wildfires over the past summers.

Crops that could be affected by a lack of water in southern France mainly include fruit and vines.